Gaussian additive white noise
Improved Non-Local Means Algorithm Based on Dimensionality Reduction
... (a) Noise free image Lena, (b) noisy image with Additive white Gaussian noise, (c) denoised image using the NLM method , PSNR= ...(b) Noise free fragment of Lena image (c) noisy ...
102
Simulation and Evaluation of Shrinkage Techniques for Image De-noising under Additive White Gaussian Noise (AWGN)
... denoising. The term wavelet thresholding is explained as decomposition of the image into wavelet coefficients, comparing the detail coefficients with a given threshold value, and shrinking these coefficients close to ...
6
Noise Standard Deviation Estimation for Additive White Gaussian Noise Corrupted Images using SVD Domain
... image; noise level estimation is one of the most important key ...accurate noise level estimation is needed before processing the ...of noise level estimation is also used for restoring the image ...
8
INTERNATIONAL JOURNAL OF ENGINEERING SCIENCES & MANAGEMENT INVESTIGATIONS ON THE PERFORMANCE ENHANCEMENT OF SELF ENCODED SPREAD SPECTRUM IN WIRELESS COMMUNICATION Kavitha Rani*, Dr.S Suresh Babu
... Spread spectrum systems are employed for the secure transmission of digital information which is achieved through spreading the signal in frequency domain. Pseudo-Noise (PN) sequences are conventionally used for ...
12
GLR Detector for Coded Signals in Noise and Interference
... a Gaussian process with zero mean and unknown covariance matrix ...receiver noise is additive white Gaussian and independent of the ...
5
Frame By Frame Digital Video Denoising Using Multiplicative Noise Model
... Three Additive White Gaussian Noise (AWGN) corrupted vid- eos namely, ...the noise models are considered in ampli- tude ...tiplicative noise nature as are used for denoising the ...
6
Multi-way relay networks: characterization, performance analysis and transmission scheme design
... Decode and Forward: DF MWRNs have been investigated in terms of the optimal pair- ing order that maximizes the achievable sum rate [50]. It has been shown in [50] that pairing the ℓ th user with the ( L − ℓ + 1 ) th ...
208
A Robust Denoising Algorithm for Sounds of Musical Instruments Using Wavelet Packet Transform
... heterogeneous noise for preprocessing of mass spectrometry data is discussed which incorporate a variance change point de- tection method in ...the Additive White Gaussian Noise from ...
7
3D Imaging Method for Stepped Frequency Ground Penetrating Radar Based on Compressive Sensing
... in noise, the effect of frequency bandwidth, and the effect of the wave travel velocity in the soil are demonstrated by simulated ...10% additive Gaussian white noise and some wave ...
13
Translation and Retrieval of Image Information to and from Sound
... The converted sound files were tested with Additive White Gaussian Noise. Here the Signal to Noise Ratio (SNR) value was varied to see how the retrieved image degrades from the original ...
6
PERFORMANCE COMPARISON OF BIT ERROR RATE FOR BPSK AND DS-BPSK FOR AWGN AND RAYLEIGH CHANNELS
... In the past two decade wireless communications has gained exponential growth due to increasing number of users and decreasing coast. The high speed digital communication over a wireless media required to understand the ...
7
ZigBee Signal Phase Tracking Using a Discrete Kalman Filter Estimator under AWGN Channel
... The objective of this research is to track the phase changes in Binary Phase Shift Keying (BPSK) modulated signal in ZigBee communication systems us- ing discrete Kalman Filter (KF). Therefore, Kalman Filtering is used ...
8
Adaptive Wavelet Packet Decomposition for Efficient Image Denoising By Using NeighSure Shrink Method
... by additive white Gaussian noise [2] is a common problem in image ...remove noise as far as possible as well as preserve ...the noise present in the image while preserving the ...
7
A Block Transmission Method for Converting a Non-Gaussian Channel into Parallel Gaussian Noise Channels
... subblock noise symbols due to an additive noise on the propagation channel become uncorrelated Gaussian random variables with same variances for a wide range of additive noise ...
5
A Blind Hammerstein Diversity Combining Technique for Flat Fading Channels
... of additive white Gaussian noise, maximal ratio combining (MRC) is a theoretically optimal combiner over fading channels in which the received signals from different paths are combined so as ...
12
Volume 2, Issue 7, July 2013 Page 458
... of additive white Gaussian noise (AWGN), and different interference signals such as, continuous wave interference (CWI), and matched spectrum interference ...
11
Mobile Radio Communications: Second and Third Generation Cellular and WATM Systems: 2nd
... Second Generation Third Generation Auto Correlation Advanced Communications Technology and Services Association of Radio Industries and Businesses Additive White Gaussian Noise Broadcast[r] ...
232
Performance Evaluation of OFDM Using BPSK over Different Fading Channel
... as Additive White Gaussian Noise fading (AWGN), Rayleigh fading and Rician fading channels scenario by utilizing Binary Phase Shift Keying adjustment (BPSK) and also Correlation made for ...
5
Bit Error Rate and Signal to Noise Ratio Performance Evaluation of OFDM System with QPSK and QAM M-array Modulation Scheme in Rayleigh, Rician and AWGN Channel Using MATLAB/Simulink
... The fading that occurs in the channels are of different types ranging from Large scale fading and Small scale fading in a multipath system. In the large-scale fading, the received signal power varies gradually as a ...
9
TRAINING AND DEVELOPMENT OFARTIFICIAL NEURAL NETWORK MODELS: SINGLE LAYER FEEDFORWARD AND MULTI LAYER FEEDFORWARD NEURAL NETWORK
... This paper proposed anew Space Time Block Coded Orthogonal Frequency-Division Multiplexing (STBC- OFDM) system based on Discrete Framelet transform (FT) instead of Fast Fourier Transform (FFT) under different channel ...
10